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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '362fa61a5c2faaf1be9e2c8ec71291c25a9d5e0986d3f7fb4a8ca19e2a204eac' 
  AND token = 'qSoU2CeFCNXlVgHruC7wbRBioST49+oY7Kue8/DjoN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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