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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70e8c8ec60d7b8404b8ddfdc605ce68975ad59f6d2c1029f597c33024e25a516' 
  AND token = 'vc37mrPMfYNjsQh05vHg4M/ME9/9zvG5PXKJWL79evs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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