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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '612acc17431b1a617302aa99b01963f8f54d6cf27c3d9f446063e4ea02271f1e' 
  AND token = 'nvcmJYohtrdpw1Tw5wSK5b/Thkzeh/J2TlX6m7s3cHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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