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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64b4536c433a3e6aec0e4f0b1d46a0ef0367ff92397fc2ef00171b9d498df6da' 
  AND token = '1TgBvRgYz/5AtQAMAxqnxOMd3OVCnVxvhUgTyZmt5gY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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