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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f32d1c603b4e440d8cd0cfe8b066bd5748f380dd4da683b9eb2f70d595d7f489' 
  AND token = '+PGPZpWa2PclJhYUqCPWtw1sT+LsM0kq4A5c26E3kIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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