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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e3468cfd159675e63ca060972298dcc61c4ad8880963fcec0c268a1ef1e4e44' 
  AND token = 'K3n341V7a1mRNnZb7pRL6w5lyPXzKdBXrtc/nguO1Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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