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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8150002a47eb935e32cc44a84407689c2cf24f0cb5d7df3ae59a472d7febb5ed' 
  AND token = 'wHIRkqusmEnoZ2H2knsuUVIAOJ8pXsGbFIBt7Sx8GBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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