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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '70ff1909b283cfb8a87a5facb269d130bd18462893827b8b5c0fc22a8f933b5f' 
  AND token = 'QVIUqXRF+i+wzoEWkrnY/GAi+3lOuMODmbo0fObTaz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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