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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c72e23709eaca2833d9c709c35093a23d2e0cb43bc11d19128d22cfe2dcc54d' 
  AND token = 'Dyq4ZpaI541Ir6wK7W0aNMTIqbkSUxtvo52T7z9C5kk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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