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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2309f750f96f6102caacbb174c5d7d86f53f4d98826ef8f7b31ed3e03ce1b0d5' 
  AND token = 'O0BeVM0enh209yVefelo9P7OqB5u3Jg3wC31zGdmFfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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