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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '485b9bd7b8f33c5f2448995f2ae6141ee2c3d7c476cf9fa1223c874853ef0759' 
  AND token = 'mIT6a2MatCfrH246Ya0j6rI2iQDr4wn99B9I66jkcLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}