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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e07712b856c8380e28951ac77b5da25d6c74640408f4ae6791823e9f5122cc85' 
  AND token = 'zMSmkuk0abEDntlp3JtyxKelPV+yk9hJJkU7MOvG54w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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