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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5877aa80c088a2a92e70b385c8c212e00746298b66bd79b3e963f60cebdbfd6' 
  AND token = '32AnanrnPI/wIFpc+FQIZlHLbBPXS81x2Y9cCbFif8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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