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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7245c4d5ed3d87e33ecc7b85bf909eac1bf97ce9c66aa7539c766d18dde385a7' 
  AND token = 'PUD1RBcEPJbREILXlThFCV4Dkhrd8wC+ToRawzkHMZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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