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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23750e69798a03e5cf37db5d7b4fec7e64e96e053cf9f77d34fef4c07423e58c' 
  AND token = 'nRUV3q2XkMs0WuGu9ImnBBAdj+6B1YCn0Wns1Hli+IA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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