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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60c06e9c38d22b87f17224f9071e722f096523cc10e33349f4b133118394cd94' 
  AND token = 'biyhwkm7EEAwl/MBmEm0RfiYWpc68w4ozlyQ+Okdt5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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