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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e0884947a5ecc483350b4ad78c4e192a2e2e9caf1e423048a5558d66f3f7c31' 
  AND token = 'wvcR8dEVBG/S9NZ2Uzzb6u253yJMvCzX8ifygJv2HVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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