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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '17041679a100dace35ca3a47b7ad75a912c2e67c9e6cb679884b72cb9b315d22' 
  AND token = 'dQ3QuBxqL5VfBoMNcW40F4Xnd8h6cAMbtf31wovyJNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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