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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '910d150e72ab0a2c6d9c968b1cf3c1fe9cbaa2aaaadc250803bf70ee12804387' 
  AND token = '0ynhyJU2AYPVEzWirK/XIt7cnQl4Nw12fHgMN52KW3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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