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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a725ea701b6c6db282386fb87b0e92920488bc15e071a6aa1c32c2b43a2e705a' 
  AND token = 'fU1utWRD+XomY0F+m7mcX5WQc93IPQ0OG7haWk2RUP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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