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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9296ef38e06a0c60fc23d3161cba5d716aed522f6b72bdc8cc9ffd0ce30fd69' 
  AND token = 'j2oUqi9tNOzf6R940KraboO0455scmsORmRebyhQubI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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