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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f03b2797ceb48f722752c59b5d659572a7b5ba9d2668d642d5fb27df60021f6' 
  AND token = 'B0uF0JqcI2WTkMdqY/bt9a+RR54R0hspGz++YVQNyds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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