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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08605c934dd9b1cc4eaf0769be668cecbffc632666966cd25720ddaa375607ec' 
  AND token = '/R7F5WgNVA1UEi90cClPG/T5Fx2bN6FcHavYF20ega0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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