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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c75d636ab334e7bd166a6c114ec2cde7fa9a45e1240c8b0333ebde2af4c6cffb' 
  AND token = '7mjeyWPw+44/ACH1nQAIZUadYOG4zQ/XQ1J6uhvKeE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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