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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '378d5e07f880a136bf3f0c4e2bd9984e1ef216ed6e63f7b91689e845f9647ef5' 
  AND token = 'oAqJvcIukPfpv79rU9KZmFp6qyb5TRkm2iRn9rn8mp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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