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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c2074a91ae78b2068374641f8ddbd3f7bcf056cad76f3250c30339c003ae5db' 
  AND token = 'A+ML6InqNw6pty7MJmZ0r7N5nc/fl/wbKn023cMi1ms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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