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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9706dba3ff2014df252f3536d0627bcb292cf92334f1af17e232acf92be9d74' 
  AND token = 'L4zJhA741SONmBnFRt+uQ25Qc7U10e2do4oM/Oqhqlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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