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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caea7a2aef5d637e7938c9972027f90d82aeadd92de51f2a6a0615dfa7c1f745' 
  AND token = 'XsPW7+FaEpWYTlb0/zXtcB6obQpMqD1iYdPQiAcIGSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00113

JSON explain

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