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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2c466e8b7babb5b2ccc44bbb7695f5b264c9f30419de585cbe750db583747cd' 
  AND token = 'F0yncIG8PZs/vsxhueNoBJbCS2LoD6hrE3PeT6Qsf0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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