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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b065b3fec9ba33c89d968a365d7333d499a0f42cb451fb3e8b2b68d17c27c04b' 
  AND token = 'bEZD4UN/yjVmNzDNRi7JgafFaey1XQ03H7S7fAMPP/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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