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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1acae6f8aba9c8d2e8f3422bf9c5de451fd0b6350fa864aebac112c9d6e8527' 
  AND token = 'veCkyNQfqJ7wNihVg+M1M3CJvr1mrBlA9aq19ipVgCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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