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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4330b00235ea19f57df4e947d3e351ef1764f530ef9464318dca2079aed4a8f4' 
  AND token = '3R7CTigpvwerxUkvcBm89YUX7gG3R7NK2jah2wnR2kY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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