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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc1a62f26ccbd417adca157a6354b765fdb2d55561f5fcae6ba4f5933d477f4f' 
  AND token = 'h2+u+0O6z6/i4EgMC2eAOJjQL3LqFppoF2lHiRG8gXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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