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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a05630341b8331d226c7408c6ba16fe46e8d3461288413faffc9ce6b21268f5d' 
  AND token = 'qFHoleNJTzmjAORda1ub1mv32D6wiGDy4hcNLA4Oy3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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